/Engine/Source/Runtime/SlateCore/Public/Rendering/DrawElementTypes.h
void SetCustomVerts ( const [FSlateShaderResourceProxy](API\Runtime\SlateCore\Textures\FSlateShaderResourceProxy) * InRenderProxy, [TArray](API\Runtime\Core\Containers\TArray)< [FSlateVertex](API\Runtime\SlateCore\Rendering\FSlateVertex) > InVerts, [TArray](API\Runtime\Core\Containers\TArray)< SlateIndex > InIndices, [ISlateUpdatableInstanceBufferRenderProxy](API\Runtime\SlateCore\Rendering\ISlateUpdatableInstanceBufferRen-) * InInstanceData, uint32 InInstanceOffset, uint32 InNumInstances )